Cable ducts inflatable sealing system Products action principle Inflatable composite material made ??of aluminum foil pipe plug , is the use of the principle of the hole inflated to achieve closure. Inflatable tube affixed with waterproof plastic plugs on both sides , waterproof glue when inflated to 2.6-2.8 kg pressure, will the pipeline , inflatable pipe plugs , the gap between the three cable completely filled , in order to achieve complete s